I just purchased a MTH 30-1143-1 Rail King NYC New York Central Empire State Express Loco & Tender. This is a traditional and not scale sized locomotive, although they are still a decent size. I am wondering what aluminum Empire State Express passenger car set would go well with this. The MTH 20-6905 18 inch cars seem like they would be to big in proportion. I am thinking something the size of the Lionel 15 inch aluminum cars would be about right. Does anyone have any recommendations? Thanks!